docs: def create(self, subid, params=None):
          ''' /v1/snapshot/create
          POST - account
          Create a snapshot from an existing virtual machine.
          The virtual machine does not need to be stopped.
  
          Link: https://www.vultr.com/api/#snapshot_create
          '''
          params = update_params(params, {'SUBID': subid})
          return self.request('/v1/snapshot/create', params, 'POST')